Re: [libvirt] [PATCH 4/6] qemu: Implement startupPolicy for USB passed through devices
On Wed, Oct 10, 2012 at 16:39:06 +0100, Daniel P. Berrange wrote:
On Tue, Oct 09, 2012 at 02:13:25PM +0200, Jiri Denemark wrote:
>
> + virBufferAddLit(&buf, "usb-host");
> + if (!dev->missing) {
> + virBufferAsprintf(&buf, ",hostbus=%d,hostaddr=%d",
> + dev->source.subsys.u.usb.bus,
> + dev->source.subsys.u.usb.device);
> + }
> + virBufferAsprintf(&buf, ",id=%s", dev->info->alias);
I'm curious about this - it will result in
-device usb-host,id=XXXXX
shouldn't we actually just leave out the entire arg. I'm not sure
what QEMU would do with such a device specification.
According to Gerd (and my testing) it's the desired command line. QEMU needs
to know about the usb-host device during incoming migration to avoid aborting
on unknown section in migration data. It's not necessary when starting a
domain from scratch but it doesn't seem to cause any harm.
Jirka